I don't know, games are beginning to reach the respectability of books.
It won't be long before my dad has to play the latest Splinter Cell, he's a Tom Clancy fan - but he's never played anything other than arcade games from the 80's and 90's. He'd need to be told what cover is. I can picture my mom being super confused by WASD for movement - it's definitely not geared toward anyone on this forum - but 'Baby's first FPS' has to start somewhere, and you never know which FPS will be the first for children.